octave

Definition

An interval of twelve semitones spanning eight degrees of the diatonic scale, representing a doubling or halving in pitch frequency.

Etymology

From Latin octavus (“eighth”). Doublet of octavo, ochava, and oitava.

Example Sentences

• "The melody jumps up an octave at the beginning, then later drops back down an octave."
• "The singer was known for astounding clarity over her entire five-octave range."
• "The octave has a pitch ratio of 2:1."

Related Words